pub fn new_birthday_probability(n: u32) -> f64 {
    // TODO: 这里写逻辑
    // todo!()
    // let d: f54 = 364/
    let mut ans: f64 = 1.0;
    for i in 0..n {
        ans = ans * (365 - i) as f64 / 365.0;
    }
    return 1.0 - ans;
}
